CAIE IGCSE Physics 3.2.4.3 Recall that visible light of a single

Practise recognising monochromatic visible light as one frequency, whether in definitions, laser contexts or prism comparisons.

Exam points

state that monochromatic light is light of a single frequency
distinguish single frequency from single amplitude, speed or brightness in choices
predict that monochromatic light refracts but does not split into a spectrum in a prism

[Maximum number: 1]

A ray of light is incident on a soap film. Fig. 5.1 shows a magnified image of a small part of the soap film. The ray of light is refracted as it enters the soap film.

Figure for Question 3.2.4.3—Recall that visible light of a single question 1 — CAIE IGCSE Physics

soap film
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air
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The refractive index of the soap film is 1.28 .

The ray of light is monochromatic red light with a wavelength of 680 nm in air.

Define monochromatic.

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3.2.4.3—Recall that visible light of a single question 1